Maybe a silly question, but if the concept of a stable coin is to maintain market cap (i.e. coin price) by dynamically altering the supply and/or demand. (e.g. Tether, Ampleforth) then what is the potential for a return on investment? For example, if USDT is always about $1 what's the upside of investing in it if the price never goes up?
The only upside is that you are hedging your funds when the price of BTC let's say is going down, sort of stopping the bleeding and losing much of your money because of the downtrend. So There are no profit to be made in a stable coin, hence the 1:1 to USD.